Two years ago I grew zukes and had some wood chips mixed in the soil around them. The wood chips caused the zukes to die with in a few weeks! None of the 6 plants survived so I now watch to many wood chips! The wood chips seem to also bring bugs!

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How's the health of the plants? Green, yellow, puny? Did you grow them in the same wood chip bed? Wood chips on the surface is ok, but mixed in is a bad idea. You may have been able to compensate by adding a high nitrogen fertilizer.